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Atoms Molecule Cell Organelle Macromolecule
CELLULAR LEVEL
N H
O
N
C
H
O
C
0.2 µm 0.5 µm
O
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Tissue Organ
100 µm
ORGANISMAL LEVEL
Organ system Organism
f: © Ed Reschke i: © Getty RF 2
Population Species
POPULATIONAL LEVEL
Community Ecosystem Biosphere
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i-j: © Getty RF; 1.1k-l: © Volume 44/Getty RF; m: © Steve Harper/Grant Heilman Photography, Inc.; n: © Robert and Jean ollock; o: NASA
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Sunlight at midday
Well
Height of obelisk
Distance between Cities = 800 km
Light rays parallel
a
Length of shadow
a
4
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Predictions
Question
Hypothesis 5
Experiment 2 Experiment 3 Experiment 4
Experiment
Experiment
Potential hypotheses
Remaining possible hypotheses
Last remaining possible hypothesis
Hypothesis 1 Hypothesis 2 Hypothesis 3 Hypothesis 4 Hypothesis 5
Hypothesis 2 Hypothesis 3 Hypothesis 5
Observation
Modify hypothesis
Reject hypotheses 2 and 3
Reject hypotheses 1 and 4
Experiment 1
Predictions confirmed
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Woodpecker Finch (Cactospiza pallida) Large Ground Finch (Geospiza magnirostris) Cactus Finch (Geospiza scandens)
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Human Cat Bat Porpoise Horse
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Human Rhesus Dog
0 40 30 20 10 60 50 70 Number of Amino Acid Differences in a Hemoglobin Polypeptide
Frog Bird
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a: © Alan L. Detrick/Photo Researchers, Inc.; b: © DAVID M. DENNIS/Animals Animals – Earth Scenes; c: © Volume 46/Corbis RF; d: © Corbis RF; e: © Mediscan/Corbis; f: © Volume 15/Photodisc/Getty RF; g: © Corbis RF; h: © Tom Brakefi eld/Corbis; i: © Volume 44/Photodisc/Getty RF;
j: © Volume 64/Corbis RF; k: © T.E. Adams/Visuals Unlimited; l: © Douglas P. Wilson/Frank Lane Picture Agency/Corbis; m: © R. Robinson/Visuals Unlimited; n: © Kari Lounatman/Photo Researchers, Inc.; o: © Dwight R. Kuhn; p: © Alfred Pasieka/Science Photo Library/Photo Researchers, Inc.
Bacteria
Archaea
Animalia
Fungi
Protista
Plantae
Eukarya
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